Material: HNBR (60) Coating: None Material Description: HNBR provides excellent abrasion and cut resistance. It works well with Air, Engine Oil, Diesel Fuel, Hydraulic Oil and Automatic Transmission Fluid applications. Some formulas may be used with Coolant/Urea. Do not use with Biodiesel. Inside Diameter (in): 5.86 Notes: Dimensions and Material Descriptions provided for reference only. Color may differ from image. Dash Size (in): 257 Cross Section Diameter (in): 0.14